吉安二次供水设备专家讲解二次供水设备原理.pdf
.Tong water supply equipment co.,ltd It is understood that the secondary water supply facilities have certain hygiene and safety standards,such as cleaning water tanks at least twice a year.At present,the secondary water supply in some residential buildings or communities is managed by property or outsourcing,and the secondary water supply facilities have problems such as aging,corrosion,and lack of regular cleaning and disinfection,which affect the water quality of residents.If the public finds any quality problems in the secondary water supply,they can complain to the health and epidemic prevention department.Introduction of secondary water supply equipment in Ji an Secondary water supply equipment is a new type of pressurized water supply equipment that appears in recent years.It can realize constant pressure water supply by controlling frequency conversion and speed regulation by microcomputer.Firstly,the working pressure of water point is set according to the actual situation,and the pressure of municipal pipe network is monitored all the time.When the pressure is lower than the pressure required by users,the microcomputer automatically controls the sub-frequency converter to start and adjust the speed of water pump to increase until the pressure of pipe network rises to the pressure required by users.And control the water pump to run at a constant speed to supply water at a constant pressure.When the water consumption increases,the speed will increase,and when the water consumption decreases,the speed will decrease,so that the water pressure of users.will always be constant.The traditional urban water supply system can separate the whole process of water supply from waterworks to users taps into two relatively independent systems:primary water supply and secondary water supply,while the pipe network direct pressurized water supply system is a system that combines them into a whole.Secondary water supply is one-time direct water supply to households.Non-negative-pressure water supply equipment is the equipment that can be used in the direct pressurized water supply system of pipe network.Directly taking the municipal pipe network as the water source,a continuous and closed relay pressurized water supply mode is formed,which completely avoids the water quality standard reduction and various water source pollution problems caused by the traditional secondary pressurized water supply system,completely maintains the water quality standard of municipal water source,makes full use of the pressure and heat energy of municipal water source,and makes up for the difference,effectively and ma*imally e*erting the energy-saving effect of frequency conversion and speed regulation.Principle of Secondary Water Supply Equipment in Ji an When the secondary water supply equipment is put into use,the water in the tap water network enters the steady-flow regulating tank,and the air in the tank is automatically e*hausted by the vacuum eliminator.When the water is full,the vacuum eliminator will automatically turn off.When the pressure of the tap water network can meet the water demand,the system will directly supply water to the tap water network through the.bypass check valve,and the water pump will not work,making full use of the original pressure of the tap water network.When the water consumption of the water pipe network is constantly increasing and the pressure of the water pipe network cant meet the water demand,the system pressure signal is fed back to the variable frequency controller by the remote pressure gauge,and the water pump starts to run,and the rotating speed is automatically adjusted to supply water at a constant pressure according to the water consumption.If the rotating speed of the water pump reaches the industrial frequency rotating speed,another water pump will be automatically started for variable frequency operation,thus realizing the function of how much difference is made up.When the water pump supplies water,if the flow of the water pump is less than that of the water pipe network,the system will keep normal water supply;During peak water consumption,if the pump flow rate is greater than that of tap water supply network,the water in the steady flow regulating tank can still maintain normal water supply for a certain period of time as a supplementary water source.At this time,the air enters the tank through the vacuum eliminator,which destroys the vacuum formation in the tank and ensures that the tap water supply network does not generate negative pressure.After the peak water consumption,the system returns to the normal water supply state;When the water supply of the tap water network stops,the water level in the steady flow.regulating tank keeps dropping,the signal of the liquid level detector feeds back to the variable frequency controller,and the water pump automatically stops to protect the water pump unit;At night,when the water flow is small and the pressure of the tap water supply network can not meet the requirements,the energy storage tank can release its stored energy,thus avoiding the frequent start-up of the water pump.The energy storage tank is configured according to the pressure stability of the tap water supply network.The secondary water supply equipment can provide you with a stable water pressure,and the secondary water supply equipment can make it easier for you to use water.If you choose a good secondary water supply equipment,please choose Tongde secondary water supply equipment.To supply water well,Tongde water supply equipment is indispensable!Cast products with character,and create an international brand of frequency conversion water supply industry!Secondary water supply equipment Secondary pressurized water supply equipment,without water storage tank or water tower,uses a single pump or multiple pumps to directly pump the water from the source into the users main network,and adjusts the speed of water pumps and the number of pumps running at any time according to the water consumption,so as to keep the network pressure constant.It can keep a constant water pressure at the peak of water use,and can lower the speed of water pump or go to sleep when no one uses water at the low point,.which has obvious energy-saving effect.In addition,the equipment has the advantages of small floor space,low comprehensive cost,reduced secondary pollution of water quality,and convenient use and maintenance.Characteristics of Secondary Water Supply Equipment in Ji an 1.The secondary water supply equipment can replace the water tower and high-level water tank,which is structurally beneficial to earthquake resistance and beautiful building.2.The tank is in a totally enclosed form,directly connected with the pump pipe,and the water does not directly contact with the outside air,thus ensuring that the water quality is not polluted.3.The battlefield area is small,the investment is low,and the complete set of equipment is easy to install and construct.4.The operation is simple,the maintenance is convenient,the water pump is automatically turned on and off,the air supply and pressurization are automatic,and no special person is required to manage it,and the water is cut off.Description of secondary water supply equipment in Ji an:1.Basic description of control technology of secondary water supply equipment:Zhengzhou secondary water supply equipment system sets a constant pressure value.If the pipe network pressure is higher than the set pressure value,the pressure transmitter will feed back the pipe network pressure to the frequency conversion control cabinet,and tap water can directly reach the user pipe network through the direct supply pipeline to supply water to the user.When the pipe pressure is lower than the set pressure due to the change of municipal pipe network pressure or water consumption of user pipe network,the pressure transmitter feeds back the pipe network pressure to the PlD controller in the variable frequency control cabinet,and the PlD controller adjusts the output frequency of the frequency converter,starts the water pump unit and adjusts the water pump speed to maintain constant pressure water supply;If the water supply requirement cannot be met,the control cabinet will control the start and stop of several power frequency pumps and the speed of variable.frequency pumps,so as to meet the requirement of constant pressure variable water supply.2.Basic description of negative pressure elimination technology of secondary water supply equipment:The secondary water supply equipment adopts microcomputer frequency conversion technology and effective negative pressure treatment technology to realize the superimposed water supply.The details are as follows:The secondary water supply equipment realizes the direct series connection with the tap water network through the vacuum compensation system and the fully enclosed structure,and overcomes the adverse effects on the network.The Zhengzhou secondary water supply equipment collects the vacuum degree and water level signals in the steady flow compensator through the pipe network pressure gauge,the vacuum suppressor and the detection devices in the steady flow compensator,and feeds back in real time.The microcomputer controls the actions of the special devices in the vacuum suppressor and the steady flow compensator to suppress negative pressure and ensure that the equipment will not affect the urban pipe network.When the municipal pipe network stops water supply,the water pump unit can still work until the pressure in the steady-flow compensator drops to the lower limit pressure set by the electrical contact,and it will automatically stop and start after water supply.In case of power failure,the water pump unit stops working,and tap water can enter the users pipe network through the straight-through pipeline.When the call comes in,the unit automatically starts up to restore normal water supply.The eight advantages of Ji an secondary water supply equipment are:(1)High efficiency and energy saving:make full use of the pressure heat energy of the municipal water source itself,and make up for the difference,thus effectively and ma*imally e*erting the energy saving effect of frequency conversion speed regulation.(2)Cleanliness and hygiene:A continuous and closed pressurized water supply mode is formed,which completely maintains the national water quality hygiene standard of municipal water sources,and fundamentally avoids the water quality standard reduction and various water source pollution problems caused by the pressurized system.(3)Eliminate waste:not only the high-level water tank is eliminated,but also the water tank of the ground(underground)pool is completely eliminated,which completely eliminates the water waste caused by the overflow of the water tank and regular cleaning.(4)Low noise in operation:When the series of secondary water supply equipment products adopt full frequency conversion adjustment scheme,they are in low noise operation condition most of the time,especially at night.(5)A fully closed water source tank with buffering function and dynamic compensation function is designed.Compared with the so-called non-negative pressure tank in the current market,it has more practical significance and simplifies the control system.(6)The product control system of this series of secondary water supply equipment fully summarizes the design and manufacturing e*perience of frequency conversion.water supply equipment in our company and at home and abroad,adopts the standard and general technical scheme of control system,and can be replaced with any manufacturers frequency converter,regulator,PLC and other components.It is particularly convenient to debug and maintain,which lays a good foundation for the lifelong after-sales service of products,and will not cause after-sales service problems due to technological progress.(7)The product control system of this series of secondary water supply equipment has high intelligence,and the coordination of machinery,electricity and instruments is fully considered in the design.It has the functions of detection and monitoring,and simple and convenient man-machine interaction.It has comprehensive fault protection functions and countermeasures.When the frequency converter is in fault protection,it will automatically degrade and run(become the power frequency automatic water supply equipment).When the automatic system fails,it can also manually operate emergency standby to win maintenance time.(8)Various communication interfaces and protocols can be selected according to requirements,so that various human-machine interfaces and monitoring computers can be connected,and various control networks and communication networks can be connected,which is suitable for special and comple*operation control and networking monitoring requirements.It can develop supporting monitoring software for users.Main functions of secondary water supply equipment in Ji an.1.The equipment has the function of timing pump switching,which makes the running time of each pump uniform,thus prolonging the service life of the pump.2.It has automatic and manual operation functions.When there is a problem in the automatic part,it can be switched to manual operation.3.The equipment has a fire water supply interface system,which can be connected with the users fire alarm sensing system,so as to achieve the purpose of automatically turning on the high-pressure fire water in case of fire,namely,two set pressures.4.Built-in real-time clock,programmable pressure running time chart,up to 8 segments of timed high and low pressure water supply function per day(water supply controller required).5.The system provides two energy-saving working modes,sleep function or au*iliary small pump function.(Water supply controller is required)6.The equipment has protection functions such as overvoltage,undervoltage,overcurrent,overload,instantaneous power failure and electronic thermal protection.7.The frequency converter has perfect self-diagnosis function,which can display the fault information code when the fault occurs so that the user can compare it.8.The equipment is equipped with a liquid level sensor system,which can prevent the water pump and frequency converter from burning when the pool is short of water.9.The equipment is equipped with phase sequence protection and phase break protection functions.If the phase break occurs in the process of using the equipment,and the phase sequence is changed by mistake,the equipment can be stopped by self-protection.Application scope of Ji an secondary water supply equipment:1.Ji an secondary water supply equipment is suitable for domestic water supply in newly-built residential quarters,villas,office buildings and comprehensive buildings.2.Domestic water supply for high-rise buildings,fire fighting water,high-class hotels and restaurants,etc.3.Ji an secondary water supply equipment is suitable for the transformation
